Dome Pistons are used in 2 stroke engines.
Domed pistons would be typically found in a hemispherical combustion chamber.
There are many, many types of pistons. The pistons of a 4-cycle gasoline internal combustion engine are different from those in a diesel powered or two-cycle two cycle engines. There are other alternative fuels that require specialized pistons too. Then within a group, such as 4-cycle gasoline automobile engines there can be domed, or pistons with valleys or cut-outs for the valves. There short sleeves, long sleeves, thick or thin wall, or cuts for different types of rings. There are literally thousands of different types or variations of pistons.
Hemi is short for hemispherical. It refers to the heads on an engine that are basicaly domed in shape. It is supposed to provide more compression area allowing more fuel mixture to be ignited at a time thus increasing horsepower. I'm fairly certain I'm remembering the definition correctly.
A domed hall is a rotunda.
It's all about flow, which is what makes power in an internal combustion engine. With a domed (aka hemispherical) cylinder head, the intake valve is on one side and the exhaust valve on the other, with the spark plug in the center of them. The Chrysler hemi did it with 2 valves and pushrods back in the early 1960's and the modern reincarnation is still doing it that way. 4 valve cylinder heads do the same thing, only with 2 intake valves and 2 exhaust valves, using overhead cams.
It is called the Domed Rotunda
Domed--granite batholiths.
Domed Mauritius giant tortoise was created in 1873.
Domed Rodrigues giant tortoise was created in 1835.
Dominic Thomas Domed goes by Dom Dom.
It is a domed tomb.
St. Michael's Golden-Domed Monastery was created in 1713.
ALL 350 heads will fit ALL other small blocks except for the 267 and 305. The only issues you might run into are with domed pistons. Closed chamber heads won't work with open chamber piston domes. Other than that, you can use any smallblock head on just about any 350.... The only other issue is using later generation heads on early generation blocks. If you're not sure, look up what year your was made, which will tell you what generation it was. Then stick with heads from the same generation. Early and late generation heads often ARE interchangeable, but modifications are usually necessary.